package day0910.demo4;

/**
 * @Author:galaxy_yan
 * @Date: 2022/9/10
 * @Time: 20:47
 * @Description
 */
public interface IUSB {

//    static {}
//
//    {}
//
//    public IUSB{}


//    默认属性为public static final
    double brand=3.3;

    void openDevice();
    void closeDevice();

}
